Salt-free diets are often prescribed to people with high blood pressure. The following data values were obtained from an experiment designed to estimate the reduction in diastolic blood pressure as a result of consuming a salt-free diet for 2 weeks. Assume diastolic readings to be normally distributed.
| Before |
108 |
86 |
92 |
101 |
99 |
96 |
91 |
108 |
| After |
100 |
77 |
90 |
96 |
98 |
86 |
85 |
106
|
What is the point estimate for the mean reduction in the diastolic reading after two weeks on this diet?
Find the 99% confidence interval for the mean reduction. (Give your answers correct to two decimal places.)
Lower limit:
Upper limit